JP2011014076A - Information processing apparatus, document enlarging display method, program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document enlarging display method which improves the operability of a display by eliminating a non-document display area and increasing the amount of information which can be displayed during enlarged display.SOLUTION: An information processing apparatus includes at least: an enlarged display control means which obtains a page area image from a document displayed in a screen display area and enlarges the page area image by a prescribed enlargement factor to display the enlarged page area image in the screen display area; and an overwrite display control means which calculates document coordinates in the screen display area and determines whether overwritten image data is within the screen display area or not on the basis of the calculated document coordinates and enlarges overwritten image data determined to be within the screen display area, by an enlargement factor and displays this data in the screen display area on the basis of document coordinates of overwritten image data.

Description

  The present invention relates to a document enlargement display method for enlarging and displaying data such as documents and images on a display device, and in particular, reducing the amount of operations such as scrolling by effectively utilizing a display screen area where no document is displayed. The present invention relates to a method for enlarging and displaying a document that can improve convenience.

When creating document data that includes characters, images, and the like, the layout and size of the characters and the like may be devised to store related data in one page. In this case, if related data is collected in one page, there is an advantage that the contents can be understood without turning the page. On the other hand, since a large amount of data is included in one page, characters and images are included. There is a disadvantage that it becomes difficult to see because of the details. When such document data is displayed by a projector or the like, it is often performed to enlarge a part of the data.
Enlarged display of document data has been well known. For example, Patent Document 1 discloses a document display device that extracts characters, images, and the like from document data for each document element, and performs enlarged display suitable for the type of document element. Are listed.
Patent Document 2 describes a display device that divides an enlarged area into a plurality of lines and displays a character string for one line so that the character string from the beginning to the end is within the display area at a time.
Patent Document 3 describes a display device that provides an enlarged image display area for enlarging and displaying an image, and that enlarges and displays characters or images in the enlarged range so as to fit in the enlarged image display area.
In Patent Document 4, the enlargement ratio in the X and Y directions when the screen is enlarged from the length in the X and Y directions of the area specified by pen input or finger input on the touch panel is obtained. An image enlarging apparatus that obtains an enlarged image without distortion by correcting an area to be actually enlarged in accordance with the aspect ratio of the screen while using the smaller enlargement ratio as the enlargement ratio at the time of correction is described.

However, the conventional techniques disclosed in the above-mentioned patent documents have a problem that the display area is not fully utilized during enlarged display. The display state during the enlarged display will be described with reference to FIG. FIG. 19 is a diagram showing a conventional display screen example, (a) is a diagram showing a normal display state, and (b) is a diagram showing an enlarged display state.
The display screen 1500 includes a document display area 1510 for displaying the contents of a document and a non-document display area 1520 for displaying other contents. In (b), the ratio of the non-document display area 1520 to the display screen 1500 does not change from (a) even though the contents of the document are enlarged and displayed in the document display area 1510. For this reason, it is not possible to display all the character strings in one line at the time of enlarged display, which is a cause of increasing the scroll amount. That is, the scroll operation must be frequently performed to display a necessary portion, and the operation is complicated.
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an enlarged document display method that improves the operability of the display device by increasing the amount of information that can be displayed by erasing the non-document display area during enlarged display. The purpose is to provide.

In order to solve the above-described problem, an invention according to claim 1 is an information processing apparatus for executing a document enlargement display method for enlarging and displaying a document displayed by an arbitrary application program. Obtaining a page area image from the document displayed in the area, enlarging the page area image to a predetermined enlargement ratio and displaying it on the screen display area; and calculating document coordinates of the screen display area Determining whether or not the overwritten image data is in the screen display area based on the calculated document coordinates, and magnifying the overwritten image data determined to be in the screen display area at the enlargement ratio And overwriting display control means for displaying in the screen display area based on the document coordinates of the overwritten image data.
The invention according to claim 2 is a document enlargement display method of an information processing apparatus having at least an enlargement display control means and an overwrite display control means, wherein the enlargement display control means is based on a document displayed in a screen display area. Obtaining a page area image, enlarging the page area image to a predetermined enlargement ratio and displaying the page area image on the screen display area; and the overwriting display control means calculates a document coordinate of the screen display area, Determining whether or not the overwritten image data is in the screen display area based on the document coordinates, and enlarging the overwritten image data determined to be in the screen display area at the enlargement ratio, And displaying on the screen display area based on the document coordinates of the overwritten image data.

According to a third aspect of the present invention, when the enlarged display control means identifies the page area, the enlarged display control means acquires a horizontal line image in the document area and continues from the leading edge or the trailing edge of the line image. 3. The document enlargement display method according to claim 2, wherein the color pixel portion is determined as a background region.
According to a fourth aspect of the present invention, the enlarged display control means acquires a horizontal document position from horizontal scroll bar information of the application program, and determines the presence or absence of a background area based on a value of the horizontal document position. Or the document enlarged display method of 3 is characterized.
According to a fifth aspect of the invention, the enlarged display control means enlarges and displays at least a part of the page area over the entire display screen area. Features method.

The invention according to claim 6 is the document according to any one of claims 2 to 5, wherein the enlargement display control means calculates the enlargement ratio of the page area based on the width of the display screen and the width of the page area. It features an enlarged display method.
According to a seventh aspect of the present invention, the overwrite drawing control means calculates a drawing coordinate by referring to the enlargement ratio from the coordinates of the drawn overwritten image data, the type of the overwritten image data, and the drawing coordinates. The document enlarged display method according to any one of claims 2 to 6, wherein the page area image is associated and stored in an overwritten image data file.
The invention according to an eighth aspect is characterized by a program for causing an information processing apparatus to execute the document enlargement display method according to any one of the second to seventh aspects.
The invention described in claim 9 is characterized by an information processing apparatus-readable recording medium on which the program according to claim 8 is recorded.

  According to the present invention, since the page area image of the document displayed in the screen display area is acquired and the displayable area is enlarged, the amount of information displayed in the screen display area is increased, and the scroll operation can be reduced. it can.

FIGS. 1A to 1C are diagrams illustrating the basic configuration of an information processing apparatus and an information processing system that implement a document enlargement display method. It is a schematic diagram for demonstrating the method to detect scroll bar information, (a) is a schematic diagram which shows the display screen of a display, (b) is the positional relationship with respect to the whole document of the document displayed on the document display area. It is a schematic diagram which shows. It is a schematic diagram which shows an example of the document position detection method of the document which the arbitrary application program which operate | moves on general purpose OS displays, (a) is a schematic diagram which shows the display screen of a display, (b) is a document display area | region. FIG. 6C is a schematic diagram showing the positional relationship of the document displayed on the entire document, and FIG. 6C is a diagram showing the contents of the document coordinate information table. It is a schematic diagram for demonstrating acquisition of overwrite image data. It is a schematic diagram for demonstrating the application example with which document position detection has an effect. (A) is a figure for demonstrating drawing of overwritten image data, (b) And (c) is a figure for demonstrating the display of overwritten image data. It is a schematic diagram for demonstrating the method of scrolling a display document. (A) (b) is a schematic diagram for demonstrating the detection method of a page area | region. It is the model for demonstrating the document position detection method at the time of enlarged display, (a) is the schematic diagram which showed the display screen at the time of non-magnified display, (b) is the document display area and display at the time of enlarged display It is the schematic diagram which showed the relationship with the magnitude | size of a screen. It is a schematic diagram for demonstrating drag scroll, (a) is the schematic diagram which showed the mode at the time of the enlarged display of a document, (b) is the schematic diagram which showed the mode after drag scroll. It is a schematic diagram which shows a display screen, (a) is a schematic diagram which shows a standard display state, (b) is a figure which shows an enlarged display state, (c) It is a figure which shows the state returned to the standard display state. is there. It is a functional block diagram of annotation software. It is a flowchart figure of annotation control. It is a flowchart figure of toolbar control. It is a flowchart figure of expansion display control. It is a flowchart figure of overwrite drawing control. It is a flowchart figure of document scroll control. It is a flowchart figure of expansion scroll control. It is a flowchart figure of overwrite display control. It is a figure which shows the example of the conventional display screen, (a) is a figure which shows a normal display state, (b) is a figure which shows an enlarged display state.

The best mode for carrying out the present invention will be described below with reference to the drawings. The document enlargement display method according to the present embodiment can integrally enlarge and reduce the overwrite image drawn on the transparent window displayed on the display screen and the content of the document seen through the transparent window. It is. First, each process will be described based on a schematic diagram and then described based on a functional configuration diagram and a flowchart.
FIG. 1A to FIG. 1C are diagrams showing the basic configuration of an information processing apparatus and an information processing system that implement the document enlargement display method according to the present embodiment.
FIG. 1A is a diagram showing a configuration of a general PC (personal computer). For example, a document 1150 created by a general document creation application such as word processor software is displayed on the display 1110 on the PC 1100, and this document is newly added to the displayed document 1150 without correcting the data of the document. The correction content 1160 is overwritten and overwritten, and the correction content 1160 is stored in association with the position in the document 1150. When the document 1150 is corrected, the correction content 1160 is displayed in a superimposed manner on the drawing position. By doing so, the document can be corrected.
FIG. 1B shows a document 1240 displayed on a screen 1230 using a notebook PC (tablet PC) 1210 and a projector 1220, and a voice of a speaker and a memo drawing 1250 on the document 1240 in a position in the document 1240. Is stored in time series, distributed to non-conference participants, and is displayed and reproduced as it is with a voice or memo document displayed and stored on the notebook PC 1210 on any PC 1260 for the purpose of reconfirmation. .
Further, in the example shown in FIG. 1C, a plurality of PCs 1310, 1320, and 1330 are connected via a network 1340, and the display state of all the PCs 1310, 1320, and 1330 is made to be the same, so that the screen of the document can be shared. Is an example of

[1. (Scroll bar information)
A main process of the overwriting data processing method according to the embodiment will be described with reference to the drawings.
First, a method for acquiring scroll bar information in a document will be described. FIG. 2 is a schematic diagram for explaining a method of detecting scroll bar information, (a) is a schematic diagram showing a display screen of a display, and (b) is an entire document of a document displayed in a document display area. It is a schematic diagram which shows the positional relationship with respect to.
The information processing apparatus is an arbitrary application program (Office (registered trademark), MS Word (operating system) such as an operating system such as Windows (registered trademark), MAC OS (registered trademark), Linux (registered trademark)). Registered trademark), Adobe Acrobat (registered trademark), Internet Explorer (registered trademark), and the like. In this example, a document 130 is displayed in the document display area 120 in the display screen 110 of the display. In addition, a horizontal scroll box 141 is provided below the document display area 120, a horizontal scroll bar 140 that scrolls the document 130 in the horizontal direction, and a vertical scroll box 151 is provided on the right side to display the document 130 in a vertical scroll display. A vertical scroll bar 150 is arranged on the upper side and a title bar 160 is arranged on the upper side.

Each value indicated by the scroll bar information will be described. VP indicates the vertical position, that is, where the upper end of the display area is relative to the vertical length (vMax) of all pages. vPage indicates the display height, that is, how much the screen display area height is relative to the total page length (vMax). vMax indicates the document height, that is, the document length from the top end of the first page to the bottom end of the last page. HP indicates the horizontal position, that is, where the left end of the display area is relative to the display page width (hMax). hPage indicates the display width, that is, how much the screen display area width is relative to the display page width (hMax). hMax indicates the page width, that is, the page length from the left end of the display page to the right end of the display page.
The vertical scroll bar information (vMax, VP, vPage) and horizontal scroll bar information (hMax, HP, hPage) of an arbitrary application program are acquired by an API (application interface) provided by the OS.

[2. (Document position)
Next, the document position detection method will be described with reference to FIG. FIG. 3 is a schematic diagram illustrating an example of a document position detection method for a document displayed by an arbitrary application program operating on a general-purpose OS. FIG. 3A is a schematic diagram illustrating a display screen on a display. FIG. It is a schematic diagram which shows the positional relationship with respect to the whole document of the document displayed on the document display area, (c) is a figure which shows the content of a document coordinate information table. Hereinafter, an example of Windows (registered trademark) will be described.
First, display window information (window identification (dHandle), upper left corner coordinates (WX, WY), width (WW), height (WH)) is retrieved by an API provided by the OS, and the maximum area (WW × WH). Is a document display area 120. The screen width (SW) and screen height (SH) of the display screen 110 are acquired by an API provided by the OS.
Scroll bar information (scroll bar identification (hHandle), upper left corner coordinates (WX0, WY0), width (WW0), height (WH0)) is retrieved by the API provided by the OS, and the lower end of the document display area 120 Let the scroll bar adjacent to be the horizontal scroll bar 140 in the document display area 120. The position (HP) of the horizontal scroll box 141 of the horizontal scroll bar 140 is acquired by an API provided by the OS.

Scroll bar information (scroll bar identification (vHandle), upper left corner coordinates (WX1, WY1), width (WW1), height (WH1)) is retrieved by the API provided by the OS, and is adjacent to the right edge of the document area. The scroll bar is a vertical scroll bar 150 in the document display area 120. The position (VP) of the vertical scroll box 151 of the vertical scroll bar 150 is acquired by an API provided by the OS.
The document position is managed in the document coordinate information table 170 as a horizontal document position (HP described above) and a vertical document position (VP described above).
The coordinates (overwrite page data) at the time of the overwriting operation are managed as relative coordinates having the origin at the upper left corner coordinates (WX, WY) of the document display area 120. The coordinate information is stored in the document coordinate information table 170. Overwrite page data is managed for each scroll.

[3. Overwrite data)
A process for drawing an overwrite image on a document and acquiring the overwrite image data will be described. FIG. 4 is a schematic diagram for explaining acquisition of overwritten image data. In this process, an overwriting is performed on the document, and an overwriting information table 260 is created in which the overwriting image data for the overwritten document is written, and is stored in the overwriting data file 270.
At the time of overwriting, as shown in (1) in FIG. 4, a transparent window that is the size that covers the entire screen of the display screen 110 at the forefront of the display screen 110 and through which the document 130 displayed in the background can be seen through. 210 is displayed. By drawing a predetermined overwritten image on the transparent window 210, the overwritten image is overwritten and displayed on the document 130.
Next, in the manner described above, the upper left corner coordinates (WX, WY), document area width (WW), document area height (WH), horizontal scroll box position (HP), vertical position of the document display area 120 of the application being displayed are displayed. The scroll box position (VP) is acquired by the API provided by the OS and stored in the overwrite information table 260.

The overwritten image includes a handwritten character, a handwritten graphic (hereinafter, the handwritten character and the handwritten graphic are collectively referred to as a handwritten character), a geometric graphic, a text, and the like. The handwritten character 220 is drawn by mouse drag. In this case, as shown in (2) of FIG. 4, the mouse drag coordinates (Xn, Yn (n = 0... M)) are sequentially set in advance. It is drawn by drawing a straight line with line width and line color. In the illustrated example, the case of M = 5 is shown. The drawing coordinates are converted into drawing coordinates (X0, Y0) with the origin at the upper left corner coordinates (WX, WY) of the document area based on the following formula, and the drawing coordinates are stored in the overwriting information table 260.
X0 = X-WX
Y0 = Y-WY
When the overwritten image is a geometric figure, for example, a square 230, as shown in FIG. 4 (3), the four vertex coordinates (X0, Y0, X1, Y1, X2, Y2, X3, Y3) of the figure are set. To be acquired. When the figure is a circle or an ellipse, the center coordinates, radius, etc. are converted into relative coordinates with the origin at the upper left corner coordinates (WX, WY) of the document area. For other geometric figures, coordinates for specifying the figure are acquired and stored in the overwriting information table 260.
Further, when the overwritten image is the text 240, as shown in (4) of FIG. 4, the upper left coordinates (TX, TY) of the text box 250 have the origin at the upper left coordinates (WX, WY) of the document area. It is obtained by converting into relative coordinates and stored in the overwriting information table 260.
Next, the image data of the document area of the target page is acquired and used as document image data for the page as shown in (5) of FIG. When the page image is not stored in the overwriting data file, the total size of the page document image data portion is zero. These data are stored in the overwrite data file 270 as the overwrite information table 260.

[4. Document position detection application example)
An application example of document position detection will be described. FIG. 5 is a schematic diagram for explaining an application example in which document position detection is effective. FIG. 5A is a diagram for explaining overwriting of overwritten image data. FIG. 5B and FIG. It is a figure for demonstrating the display of overwrite image data.
At the time of drawing overwritten image data, as shown in (a), as described in “3. Overwrite data”, the transparent window 210 is displayed. When the figure 180 is drawn on the transparent window 210 by dragging the mouse or the like, the figure 180 is overwritten and displayed on the document 130. At this time, the document position (VP, HP) of the displayed document 130 is detected with the upper end of the first page and the left end of the page of the document 130 as the origin (VP = 0, HP = 0), and the drawing data of the figure 180 is increased. The document image data is stored in the overwrite data file 270. In addition, a tag window 190 is displayed in association with the drawing area of the graphic 180. A supplementary explanation or the like can be input to the tag window 190, and the contents are stored in the overwriting data file 270. After the supplementary explanation is input, when the sticky note window 190 is closed, the sticky note icon 200 is displayed on the transparent window 210.
As shown in (b) and (c), the overwritten image data automatically detects the display position of the document 130 by the method described in “2. Document position” and overwrites the portion displayed on the display screen. When image data (graphic 180) exists, the overwritten image data is called from the overwritten data file 270 and displayed at the same document position as when it was drawn. Further, by double-clicking the sticky note icon 200, a sticky note window 190 is displayed, and a supplementary explanation document is displayed.
According to the above procedure, it is possible to artificially write a correction instruction for the document 130 or, if the document 130 is a manual or the like, without changing the original document 130.

[5. (Document scrolling method)
A method of scrolling and displaying a document displayed on the background of a transparent window will be described using an example of Windows (registered trademark). In the present embodiment, the document displayed on the background can be scroll-displayed by performing a drag operation on the transparent window displayed on the forefront of the display screen. FIG. 6 is a schematic diagram for explaining a method of scrolling the display document.
First, dHandle, which is a window identification (window handle) of a document area, is searched and acquired by an API provided by Windows (registered trademark). Similarly, hHandle, which is a horizontal scroll bar identification for horizontally scrolling and displaying the document 130, and vHandle, which is a vertical scroll bar identification for vertically scrolling the document 130, are searched and acquired by an API provided by Windows (registered trademark).

For example, when a drag operation is performed from the point 300 (X0, Y0) to the point 301 (X1, Y1), the horizontal drag distance HL and the message transmission count HN, the vertical drag distance VL and the message transmission count Each of the VNs is calculated and the following message is transmitted to the document area window to scroll the document 130. The following message is an example when the horizontal scroll line length is 16 pixels and the vertical scroll line length is 16 pixels. Here, the scroll line length is a pixel length that moves in one message, and is acquired by the detection means.
HL = (X0−X1), HN = absolute value (HL) ÷ 16
VL = (Y0−Y1), VN = absolute value (VL) ÷ 16
For horizontal scrolling,
When HL <0, the message is transmitted HN times or less.
:: SendMessage (dHandle, WM_HSCROLLL, SB_LINELEFT, hHandle)
When HL> 0, the message is transmitted HN times or less.
:: SendMessage (dHandle, WM_HSCROL, SB_LINERIGHT, hHandle)
For vertical scrolling,
When VL <0, the message is transmitted VN times or less.
:: SendMessage (dHandle, WM_VSROLL, SB_LINEUP, vHandle)
When VL> 0, the message is transmitted VN times or less.
:: SendMessage (dHandle, WM_VSCROLL, SB_LINEDOWN, vHandle)
Here, SB_LINEDOWN is a scroll code for scrolling upward. By transmitting this code, the entire display moves upward, and one line is additionally displayed at the lower end. SB_LINEUP is a scroll code for scrolling downward. By transmitting this code, the entire display moves downward, and one line is additionally displayed at the upper end.
SB_LINERIGHT is a scroll code for scrolling leftward. By transmitting this code, the entire display moves to the left, and one line is additionally displayed at the right end. SB_LINELEFT is a scroll code that scrolls in the right direction. By transmitting this code, the entire display moves to the right, and one line is additionally displayed at the left end.

[6. (Page area detection method)
A method for detecting the page area will be described with reference to FIG. FIG. 7 is a schematic diagram for explaining a page region detection method. The page area refers to an area excluding the background area where the document 130 is not displayed from the document display area 120.
First, the document display area 120 is detected by an API provided by the OS, and the upper left coordinates (WX, WY), width (WW), and height (WH) of the document display area 120 are acquired. Next, the horizontal scroll bar 140 is detected, and the horizontal document position (HP), display width (hPage), and page width (hMax) are acquired (refer to FIG. 2 for HP, hPage, and hMax).
A pixel image 320 (line image) having a length (WW) with a start point coordinate (WW, WY + WH-1) is obtained for the horizontal line positioned at the lowest position in the document display area 120.
When the horizontal document position HP == 0, the color of the first pixel of the pixel image 320 (the part corresponding to the array [0] shown in FIG. 7B) is determined as the background color, and this color Are detected as the background color, and the length is defined as the left background length (LL). When HP> 0, it is determined that there is no background at the left end of the document display area 120.
Further, when HP + hPage == hMax, the color of one pixel of the final image of the pixel image 320 (the part corresponding to the array [WW-1] shown in FIG. 7B) is determined as the background color, and this color is continuous. The detected portion is detected as the background color, and the detected length is set as the right background length (LR). If HP + hPage <hMax, it is determined that there is no background at the right end of the display area.
Finally, the page area 310 is determined as upper left corner coordinates (WX + LL, WY), width (WW-LL-LR), and height (WH).

[7. (Detection of enlarged display document position)
A method for detecting an enlarged document position will be described with reference to FIG. FIG. 8 is a schematic diagram for explaining a document position detection method at the time of enlarged display, (a) is a diagram showing a display screen at the time of non-magnified display, and (b) is a document display at the time of enlarged display. It is the figure which showed the relationship between an area | region and the magnitude | size of a display screen. The screen coordinates are coordinates based on the upper left corner of the screen display area 410, and the document coordinates are based on the origin (VP = 0, HP = 0) of the enlarged document 430 (enlarged document 130). Are the coordinates.
First, the screen width (SW) and screen height (SH) of the display screen 110, and the upper left coordinates (WX, WY), width (WW) and height of the document display area 120 displayed by an arbitrary application program ( WH) is acquired by an API provided by the OS. Further, the left background length (LL) and the right background length (LR) are detected by the method described in “6. Page Area Detection Method”, and the page area 310 is acquired. Further, the document position (VP, HP) is acquired by the method described in “2. Document position”.
Here, as shown in FIG. 8B, the document display area 120 is enlarged at a predetermined magnification L (eg, 1.5 times, 2.0 times, etc.) to become an enlarged document display area 420. . What can be displayed on the display screen 110 is the contents of the screen display area 410 (RW × RH). Enlarged document left end length (H), enlarged document upper end length (V), document coordinates (RX, RY) at the upper left end of the screen display area 410, document width (RW) of the screen display area 410, document height of the screen display area 410 If (RH), (RX, RY), RW, and RH are calculated as follows.
RX = HP + LL + H ÷ L
RY = VP + V ÷ L
RW = SW ÷ L
RH = SH ÷ L
If the screen coordinates of the point 401 shown in FIG. 8B are (X, Y), the document coordinates (PX, PY) of the point 401 are calculated as follows.
PX = RX + X ÷ L
PY = RY + Y ÷ L
Further, the condition that the document coordinates (HP0, VP0) of the point 402 is in the screen display area 410 is as follows:
RX <= HP0 <(RX + RW) and
RY <= VP0 <(RY + RH).
Further, the screen coordinates (X0, Y0) of the point 402 are calculated as follows.
X0 = (HP0−RX) × L
Y0 = (VP0−RY) × L

[8. (Enlarged display scroll)
A scrolling method during enlarged display will be described with reference to FIG. 9A and 9B are schematic diagrams for explaining drag scrolling. FIG. 9A is a diagram showing a state at the start of enlarged display of a document, and FIG. 9B is a diagram showing a state after drag scrolling. . In the present embodiment, the document can be scrolled and displayed by performing a mouse drag operation.
As shown in (a), when the enlarged display of the document is started, the upper left end (H = 0, V = 0) of the enlarged document display area 420 is the upper left end (X = 0, V) of the screen display area 410 (display screen 110). Y = 0). At this time, the left end length of the enlarged document (H0 = 0) and the upper end length of the enlarged document (V0 = 0) are obtained.
In drag scrolling, for example, a left mouse button is pressed at a point 401 (screen coordinates (X, Y)) on the display screen 110 and dragged to a point 402 (screen coordinates (X0, Y0)). Scroll in the drag direction.
The left end length (H) of the enlarged document and the upper end length (V) of the enlarged document during drag scrolling are calculated as follows.
H = H0 + (X−X0)
V = V0 + (Y−X0)
During the drag scroll, the enlarged document left end length (H) and the enlarged document upper end length (V) are sequentially calculated, and the enlarged document display area 420 is displayed in the screen display area 110 based on the calculated values.

[9. (Enlarged display operation method)
An operation method for enlarging and displaying a document will be described with reference to FIG. FIG. 10 is a schematic diagram showing a display screen, (a) is a schematic diagram showing a standard display state, (b) is a diagram showing an enlarged display state, and (c) a state returned to the standard display state. FIG.
As described in “3. Overwrite data”, data that can be overwritten on the document 130 includes handwritten characters, geometric figures, text, and the like. Hereinafter, for convenience, only the handwritten characters will be described. Software that controls overwriting is called annotation software.
First, the annotation software starts operating by an activation means (double-clicking on a desktop icon, etc.) provided by the OS (Windows (registered trademark)). At the start of software operation, a transparent window 210 is displayed. Overwriting drawing is performed on the transparent window 210. Subsequently, the annotation toolbar 500 is displayed on the transparent window 210. The annotation toolbar 500 displays “overwrite”, “scroll”, “enlarge”, and “end” buttons.

  The annotation toolbar 500 will be described. By pressing the “Overwrite” button, handwritten characters can be drawn on the document 130. By pressing the “scroll” button, the scroll display described in “8. That is, by dragging on the document 130, a horizontal scroll message corresponding to the horizontal movement amount and a vertical scroll message corresponding to the vertical movement amount are transmitted to the document display window to scroll the document. By pressing the “enlarge” button, the display magnification menu 510 is displayed, and the document display area 120 is enlarged and displayed at the selected enlargement ratio. By pressing the “Finish” button, the transparent window 210 is closed, the overwritten image data is saved, and the annotation software is terminated. By depressing a “screen” button in the display magnification menu 510, the page area is enlarged and displayed at a magnification that is the screen size. More specifically, the page area is enlarged and displayed on the display screen 110 at a magnification that enlarges the width of the page area to the screen width.

In FIG. 10A, handwritten characters 530 are drawn on the transparent window 210. The handwritten characters 530 are sequentially drawn between the drag coordinates by performing a mouse drag operation on the transparent window 210. Note that the line type and line color of the handwritten character 530 are set in advance.
FIG. 10B shows a state in which the document 130 is enlarged and displayed at 200%. At the time of enlarged display, an image of the page area is first acquired to create a full-screen size window, and the enlarged image is displayed in the created window.
The annotation toolbar 520 at the time of enlarged display displays “Overwrite”, “Scroll”, and “Standard” buttons. Since the “Overwrite” button corresponds to the “Overwrite” button on the annotation toolbar 500, description thereof is omitted. By pressing the “scroll” button, the enlarged display image is drag-scrolled. By depressing the “standard” button, a transition to the standard display state shown in FIG.
As shown in (b), at the enlarged display, the handwritten characters 530 drawn at the standard display are set to the drawing document position at the standard display, and the thickness of the drawing line is set to 200%, which is the same as the enlargement ratio of the document 130. Enlarge and draw. In addition, a new handwritten character 540 can be drawn even during enlarged display. At this time, the drawing coordinates of the handwritten character 540 are converted into document coordinates at the time of standard display and stored.
When the standard display state is shifted from (b) to (c), the handwritten characters 540 drawn at the time of enlarged display are drawn at the document position at the time of drawing with the thickness set as the drawing line.

[10. (Annotation control function configuration)
The functional configuration of the annotation software will be described. FIG. 11 is a functional configuration diagram of the annotation software.
The annotation software 600 is activated by a program activation unit provided by an OS (Windows (registered trademark)). The mouse data 700 is input and overwritten on a document displayed by other application software (Word, Acrobat, etc.) operating on the OS, and document scrolling is executed.
The annotation control 610 is initialized when the annotation software 600 is activated, and displays the transparent window 210 and the annotation toolbar 500 on the display screen 110. The mouse data 700 is input, and a toolbar control 620, document scroll control 630, enlargement scroll control 640, and overwrite drawing control 650, which will be described later, are executed.
The toolbar control 620 executes a function set for the button by pressing the button of the annotation toolbar 500. The document scroll control 630 scrolls and displays the document 130 by a drag operation on the document 130. The enlarged scroll control 640 scrolls and displays the enlarged image by a drag operation on the enlarged image. The overwrite drawing control 650 draws a line between the coordinates by a drag operation, converts the overwrite image data from the screen coordinates to the document coordinates, and saves it. The enlarged display control 660 detects a page area and enlarges and displays the page area image. The overwrite display control 670 calls and draws the overwrite image data to the screen display area from the overwrite data file 270 when the mode is changed (normal display → enlarged display, enlarged display → normal display) and when scrolling is executed. The control information table 680 is stored in an area that can be referred to from all the controls of the annotation control 610 to the overwrite display control 670, and controls the annotation processing.

An enlarged display control (enlarged display control means) 660 that acquires a page area image from a document displayed in the screen display area, enlarges the page area image to a predetermined enlargement ratio, and displays it on the screen display area; The document coordinates of the area are calculated, the overwritten image data in the screen display area is determined based on the calculated document coordinates, the overwritten image data in the screen display area is enlarged at the enlargement ratio, and the upper Each function constituting a PC (information processing apparatus) 1100 having at least an overwrite display control (overwrite display control means) 670 for displaying in the screen display area based on the document coordinates of the document image data is programmed, and the CD- Write to a recording medium such as a ROM, and attach this CD-ROM to a medium drive device such as a CD-ROM drive installed in the computer. Stores these programs in memory or storage device of the computer, by executing it, it is needless to say that the object of the present invention is achieved.
In this case, the program itself read from the recording medium realizes the functions of the above-described embodiment, and the program and the recording medium recording the program also constitute the present invention.

[11. Annotation control flow
A flowchart of the annotation control 610 will be described with reference to FIG.
[S1] A window is searched using an API provided by the OS, and the maximum window displayed in the foreground is set as a document area window.
[S2] Document area window identification, document area upper left corner coordinates (WX, WY), document area width (WW), and document area height (WH) are acquired and stored in the control information table 680.
[S3] The scroll bar is searched by the API provided by the OS, and the scroll bar located at the right end of the document display area 120 is set as the vertical scroll bar 150.
[S4] The vertical scroll bar identification is stored in the control information table 680.
[S5] The scroll bar is searched by the API provided by the OS, and the scroll bar located at the lower end of the document display area 120 is set as the horizontal scroll bar 140.
[S6] The horizontal scroll bar identification is stored in the control information table 680.
[S7] A transparent window 210 of full screen size is displayed on the forefront of the display screen 110.
[S8] The annotation toolbar 500 is displayed.
[S9] For the control information table 680, control mode (overwrite), display magnification (1.0), left background length (0), right background length (0), drawing line color (red), drawing line width (16 pixels) ), The previous coordinate (-1, -1), the enlarged document left end length (0), and the enlarged document upper end length (0). The previous coordinate (-1, -1) is an invalid value.

[S10] When mouse data is input, the process proceeds to the next step.
[S11] It is determined whether the mouse coordinates (X coordinate, Y coordinate) are on the annotation toolbar 500.
[S12] When it is on the annotation toolbar 500, mouse data is passed and "toolbar control 620" is executed.
[S13] It is determined whether or not the control mode is “overwrite”.
[S14] In the overwrite mode, mouse data is transferred and "overwrite drawing control 650" is executed.
[S15] It is determined whether or not the control mode is “document scroll”.

[S16] When in the document scroll mode, "document scroll control 630" is executed.
[S17] It is determined whether or not the control mode is "enlarged scroll".
[S18] In the enlargement scroll mode, "enlargement scroll control 640" is executed.
[S19] It is determined whether or not the control mode is “end”.
[S20] In the end mode, the transparent window 210 is deleted.
[S21] The overwritten image data is stored in the overwritten data file 270 and the process ends.

[12. (Toolbar control flow)
A flowchart (S12) of the toolbar control 620 will be described with reference to FIG. The toolbar control 620 is executed with mouse data 700 (X coordinate, Y coordinate, status) as input values.
[S31] It is determined whether the mouse coordinates are on the “overwrite” button of the annotation toolbar 500.
[S32] When the button is overwritten, the “control mode” in the control information table 680 is set to “overwrite”.
[S33] The previous coordinate of the control information table 680 is set to (-1, -1), and the subroutine is terminated.
[S34] When S31 is No, it is determined whether the mouse coordinates are on the “scroll” button of the annotation toolbar 500.
[S35] When the scroll button is on, the previous coordinate of the control information table 680 is set to (-1, -1).

[S36] It is determined whether or not the current display magnification L stored in the control information table 680 is “1.0”.
[S37] When the display magnification is “1.0”, the control mode of the control information table 680 is set to “document scroll”, and the subroutine is terminated.
[S38] If the display magnification is not "1.0", it is determined that the enlarged display is being performed, the control mode of the control information table 680 is set to "enlarged scroll", and the subroutine is terminated.
[S39] When No in S34, it is determined whether the mouse coordinates are on the “enlarge” button of the annotation toolbar 500.
[S40] When the enlarge button is clicked, the “display magnification menu 510” (screen, 150%, 200%, 300%) is displayed, and the subroutine is terminated.
[S41] When S39 is No, it is determined whether the mouse coordinates are on the “display magnification menu 510”.
[S42] The control information table 680 is initialized to the upper left coordinate (0, 0), the document area width (screen width), the document area height (screen height), and the previous coordinate (-1, -1). .
[S43] The display magnification is passed and "enlarged display control 660" is executed.
[S44] "Overwrite display control 670" is executed to display overwriting at the document position during enlarged display.
[S45] The display of the annotation toolbar 500 is changed to the annotation toolbar 520 (overwriting, scrolling, standard) for enlarged display, and the subroutine is terminated.

[S46] If No in S41, it is determined whether the mouse coordinates are on the annotation toolbar 520 "standard" button.
[S47] When the standard button is on, the document area window identification information of the control information table 680 is acquired, and the document area upper left coordinates (WX, WY), document area width (WW), and document area height of the control information table 680 are acquired. (WH), display magnification (1.0), left background length (0), right background length (0), enlarged document left end length (0), and enlarged document upper end length (0).
[S48] The enlarged display window is deleted. By erasing, the application displayed under the enlarged display window is displayed.
[S49] "Overwrite display control 670" is executed to display overwriting at the document position when the application is displayed.
[S50] The annotation toolbar 520 is changed to the annotation toolbar 500 (overwrite, scroll, enlarge, end) when displaying an application, and the subroutine ends.
[S51] When No in S46, it is determined whether the mouse coordinates are on the “End” button of the annotation toolbar 500.
[S52] When the end button is pressed (Yes in S51), the “control mode” in the control information table 680 is set to “end”, and the subroutine is ended.
When the answer is No in S51, the subroutine is terminated.

[13. (Enlarged display control flow)
A flowchart (S43) of the enlarged display control 660 will be described with reference to FIG. The enlarged display control 660 is executed with the display magnification selected from the display magnification menu 510 as an input value.
[S61] The lowest 1-line image data of the document area is acquired.
[S62] The page area is detected by the method described in “6. Page Area Detection Method”.
[S63] The detected left background length LL is stored in “left background length” of the control information table 680.
[S64] The detected right background length LR is stored in the “right background length” of the control information table 680.
[S65] It is determined whether or not the input display magnification is “screen”.
[S66] When the display magnification is “screen” (Yes in S65), the display magnification is calculated by the following equation.
Display magnification (L) = screen width / (WW-LL-LR)
[S67] The calculated display magnification is stored in “Display magnification” of the control information table 680.
[S68] A page area image is acquired.
[S69] The page area image is enlarged and stored in the “page area image” of the information control table 680.
[S70] A full-size window for displaying an enlarged image is displayed.
[S71] The upper left area of the enlarged image is displayed at the upper left corner of the window.
[S72] “0” is stored in “enlarged document left end length” in the control information table 680.
[S73] “0” is stored in “Upper end length of enlarged document” of the control information table 680.
Exit the subroutine.

[14. Overwrite drawing control flow)
With reference to FIG. 15, the flowchart (S14) of the overwrite drawing control 650 will be described. The overwrite drawing control 650 is executed using mouse data (X coordinate, Y coordinate, status) as an input value.
[S81] It is determined whether the “previous coordinate” in the control information table 680 is an invalid value (−1, −1). If Yes, the process of [S87] is executed.
[S82] If the previous coordinate is a valid value (No in [S81]), the “drawing line width” in the control information table 680 is enlarged by the display magnification (L).
[S83] Line drawing is performed between the previous coordinate and the current coordinate (input value) using the line width and control information table “drawing line color”.
[S84] The drawing coordinate X is calculated by the following equation.
Drawing coordinate X = (X coordinate + enlarged document left end length (H)) ÷ display magnification (L) + left background length (LL) −document area upper left end coordinate (WX)
(Enlarged display: WX = 0, standard display: LL = 0, H = 0, L = 1.0)
[S85] The drawing coordinate Y is calculated by the following equation.
Drawing coordinate Y = (Y coordinate + enlarged document upper end length (V)) ÷ display magnification (L) −document area upper left end coordinate (WY)
(Enlarged display: WY = 0, standard display: V = 0, L = 1.0)
[S86] The drawing coordinate data is saved.
[S87] The current coordinates (X coordinate, Y coordinate) are stored in the “previous coordinates” in the control information table 680, and the subroutine is terminated.

[15. (Document scroll control flow)
The flowchart (S16) of the document scroll control 630 will be described with reference to FIG. This control is executed using mouse data (X coordinate, Y coordinate, status) as an input value. Status 0: ON is notified only when dragging starts, and Status 1: OFF is notified only once when dragging ends.
[S91] The vertical movement amount is calculated.
Vertical movement amount = previous coordinate Y-current coordinate Y
[S92] The number of vertical scrolls is calculated.
Number of vertical scrolls = vertical movement amount ÷ vertical scroll line length The vertical movement amount is the value obtained by the following formula.
Vertical movement amount = vertical scroll number × vertical scroll line length [S93] It is determined whether or not to transmit a vertical scroll number message (:: SendMessage ()). When not transmitting (No), it progresses to S98.
[S94] When a message is transmitted (Yes in S93), it is determined whether the drag operation is from the bottom to the top. When S94 is No, the process proceeds to S96.
[S95] When a drag operation is performed from the bottom to the top (Yes in S94), an up scroll message (SB_LINEDOWN) is transmitted to the document area window.
[S96] When a drag operation is performed from top to bottom (No in S94), a down scroll message (SB_LINEUP) is transmitted to the document area window.
[S97] The number of vertical scrolls as a message transmission counter is subtracted.
[S98] The amount of horizontal movement is calculated.
Horizontal movement amount = previous coordinate X-current coordinate X
[S99] The number of horizontal scrolls is calculated.
Number of horizontal scrolls = horizontal movement amount ÷ horizontal scroll line length The horizontal movement amount is the value obtained by the following formula.
Horizontal movement amount = horizontal scrolling number × horizontal scrolling line length [S100] It is determined whether or not to transmit a horizontal scrolling number message (:: SendMessage ()). When not transmitting (No), the process proceeds to S105.

[S101] When sending a message (Yes in S100), it is determined whether the drag operation is from right to left.
[S102] When a drag operation is performed from right to left (Yes in S101), a left scroll message (SB_LINERIGHT) is transmitted to the document area window.
[S103] When a drag operation is performed from left to right (No in S101), a right scroll message (SB_LINELEFT) is transmitted to the document area window.
[S104] The number of horizontal scrolls as a message transmission counter is subtracted.
[S105] It is determined whether or not the status is "ON". If No, the process proceeds to S107.
[S106] If Yes in S105, overwrite page data 261 (see FIG. 4) is saved at the start of dragging.
[S107] The vertical document position (VP) is updated by the vertical movement amount.
[S108] The horizontal document position (HP) is updated by the horizontal movement amount.
[S109] "Overwrite display control 670" is executed to display overwriting at the document position after scrolling.
[S110] The current coordinate is stored in the control information table “previous coordinate”.

[16. (Expansion scroll control flow)
A flowchart (S18) of the enlargement scroll control 640 will be described with reference to FIG. Enlargement scroll control is executed using mouse data (X coordinate, Y coordinate, status) as an input value.
[S111] The vertical movement amount is calculated by the following equation.
Vertical movement amount = previous coordinate Y-current coordinate Y
[S112] It is determined whether the drag operation is from the bottom to the top. When the drag operation from top to bottom (No), the process proceeds to S115.
[S113] When the drag operation is performed from the bottom to the top (Yes in S112), the vertical movement amount display image is moved upward.
[S114] The image of the lower end movement area is acquired from the control information table “page area image” and displayed in the lower end movement area. Thereafter, the process of S117 is executed.
[S115] When a drag operation is performed from top to bottom (No in S112), the vertical movement amount display image is moved downward.
[S116] The image of the upper end movement area is acquired from the control information table “page area image” and displayed in the upper end movement area.
[S117] The horizontal movement amount is calculated by the following equation.
Horizontal movement amount = previous coordinate Y-current coordinate Y
[S118] It is determined whether the drag operation is from right to left. When the drag operation is performed from right to left (No), the process proceeds to S121.
[S119] When a drag operation is performed from right to left (Yes in S118), the horizontal movement amount display image is moved to the left.
[S120] The image of the right end moving area is acquired from the control information table “page area image” and displayed in the right end moving area. Thereafter, the process of S123 is executed.
[S121] When the drag operation is performed from left to right (No in S118), the horizontal movement amount display image is moved to the right.
[S122] The image of the left end moving area is acquired from the control information table “page area image” and displayed in the left end moving area.
[S123] The vertical length of the enlarged document upper end length is updated.
[S124] The left end length of the enlarged document is updated by the horizontal movement amount.
[S125] The subroutine "Overwrite display control" is executed to display overwriting at the document position after scrolling.
[S126] The current coordinates are stored in the control information table “previous coordinates”.
Exit the subroutine.

[17. (Overwrite display control flow)
The flowchart (S44, S49, S109, S115) of the overwrite display control 670 will be described with reference to FIG.
[S131] The leftmost document coordinate of the display area is calculated by the following equation.
Display left end coordinate (HL) = horizontal document position (HP) + left background length (LL) + enlarged document left end length (H) ÷ display magnification (L)
(Standard display: LL = 0, H = 0, L = 1.0)
[S132] The display area right end document coordinates are calculated by the following formula.
Display coordinate right end (HR) = Display coordinate left end (HL) + Document area width (WW) ÷ Display magnification (L)
(Enlarged display: WW = screen width, WH = screen height)
[S133] The display area upper end document coordinates are calculated by the following equation.
Display top coordinate (VT) = vertical document position (VP) + enlarged document top length (V) ÷ display magnification (L)
[S134] The display area lower end document coordinates are calculated by the following formula.
Display area end coordinates (VB) = display upper end coordinates (VT) + document area height (WH) ÷ display magnification (L)
[S135] “Overwrite page total number (P)” is set from the overwrite data file 270.
[S136] It is determined whether all overwritten image data has been processed. If all processing has been performed (No in S136), the subroutine is terminated.

[S137] When Yes in S136, overwrite page data is input from the overwrite information table 260.
[S138] The number of page strokes (N) is set from the overwrite information table 260. One stroke is a drawing from the left button ON to the left button OFF, and is stored in the overwriting information table 260 at the time of overwriting.
[S139] It is determined whether all strokes of the overwrite page have been processed. If all strokes have been processed (No), the process of S156 is performed.
[S140] When Yes in S139, the number of drawing coordinates (O) for one stroke is set.
[S141] Set drawing width = line width × display magnification (L).
[S142] The previous coordinate is set to invalid (-1, -1).
[S143] It is determined whether all drawing coordinates of the stroke have been processed. When all drawing coordinates have been processed (No in S143), the process of S155 is performed.
[S144] When Yes in S143, the document coordinate X is calculated by the following equation.
Document coordinate X = Horizontal document position (HP) + Drawing coordinate X
[S145] The document coordinate Y is calculated by the following equation.
Document coordinate Y = vertical document position (VP) + drawing coordinate Y

[S146] It is determined whether the document coordinate X is within the range calculated in S131 and S132, that is, whether HL <= X <HR. When it is not within the range (No in S146), the process of S153 is performed.
[S147] When Yes in S146, it is determined whether the document coordinate Y is within the range calculated in S133 and S134, that is, whether VT <= Y <VB. When it is not within the range (No in S147), the process of S153 is performed.
[S148] If the document coordinates are in the document area (both S146 and S147 are Yes), the document coordinates X are converted into screen coordinates X.
Screen coordinate X = (document coordinate X−display left end coordinate (HL) + document region upper left upper end coordinate (WX)) × display magnification (L)
[S149] If the document coordinates are in the document area (both S146 and S147 are Yes), the document coordinates Y are converted to the screen coordinates Y.
Screen coordinate Y = (document coordinate Y−display upper end coordinate (VT) + document region upper left end coordinate (WY)) × display magnification (L)
[S150] It is determined whether the coordinates immediately before line drawing are invalid values. If it is an invalid value (Yes in S150), the process of S152 is performed.
[S151] When No in S150, a line is drawn between the screen coordinates and the linear coordinates with the drawing width and line color.
[S152] Save the screen coordinates as the previous coordinates.
[S153] The previous coordinate is set to an invalid value (-1, -1).
[S154] The number of drawing coordinates is subtracted.
[S155] The number of page strokes is subtracted.
[S156] The number of overwritten pages is subtracted.

As described above, according to the present invention, since the page area image of the document displayed in the screen display area is acquired and enlarged, the amount of information displayed in the screen display area increases and the scroll operation is reduced. Can do. As a result, meetings and presentations can proceed smoothly.
Further, the page area excluding the background can be detected from the document display area and can be enlarged and displayed. Further, the page area can be enlarged and displayed on the entire display screen area. Further, the page area can be enlarged in accordance with the width of the display screen. Further, since the document position and the position of the overwrite image are stored in association with each other, the overwrite image data can be displayed at the same document position even during scroll display. In addition, an overwritten image can be drawn at the time of enlarged display, and the drawn overwritten image is reduced and displayed at the time of standard display, so that more overwritten images can be recorded in a narrow area.
Further, the annotation software according to the present invention can be distributed to a third party by recording it on a computer-readable recording medium such as a CD-ROM.

  DESCRIPTION OF SYMBOLS 110 ... Display screen, 120 ... Document display area, 130 ... Document, 140 ... Horizontal scroll bar, 141 ... Horizontal scroll box, 150 ... Vertical scroll bar, 151 ... Vertical scroll box, 160 ... Title bar, 170 ... Document coordinate information table 190 ... Sticky note window, 200 ... Sticky note icon, 210 ... Transparent window, 220 ... Handwritten character, 230 ... Square, 240 ... Text, 250 ... Text box, 260 ... Overwrite information table, 261 ... Overwrite page data, 270 ... Overwrite data file, 300, 301 ... dot, 310 ... page area, 320 ... pixel image, 401, 402 ... dot, 410 ... screen display area, 420 ... enlarged document display area, 430 ... enlarged document, 500 ... annotation toolbar , 510 ... Display magnification menu, 52 ... Annotation toolbar, 530. Handwritten characters, 540. Handwritten characters, 600. Annotation software, 610. Annotation control, 620. Enlarged display control, 670 ... display control, 680 ... information control table, 680 ... control information table, 700 ... mouse data, 1100 ... PC, 1110 ... display, 1150 ... document, 1160 ... modified content, 1210 ... notebook PC, 1220 ... Projector, 1230 ... Screen, 1240 ... Document, 1250 ... Memo drawing, 1260 ... PC, 1310 ... PC, 1340 ... Network, 1500 ... Display screen, 1510 ... Document display area, 1520 ... Non-document display area

JP 2008-070831 A JP 2007-226213 A JP 2007-0799947 A Japanese Patent No. 3543397

Claims (9)

An information processing apparatus for executing a document enlargement display method for enlarging and displaying a document displayed by an arbitrary application program in a screen display area,
An enlarged display control means for acquiring a page area image from the document displayed in the screen display area, enlarging the page area image to a predetermined enlargement ratio, and displaying the page area image in the screen display area;
The document coordinates of the screen display area are calculated, it is determined whether or not the overwritten image data is in the screen display area based on the calculated document coordinates, and it is determined that the overwritten image data is in the screen display area. An information processing apparatus comprising: at least an overwriting display control unit that enlarges the book image data at the enlargement ratio and displays the same on the screen display area based on the document coordinates of the overwritten image data. A document enlargement display method of an information processing apparatus having at least an enlargement display control means and an overwrite display control means,
The enlarged display control means acquires a page area image from the document displayed in the screen display area, enlarges the page area image to a predetermined enlargement ratio, and displays the page area image in the screen display area;
The overwriting display control means calculates the document coordinates of the screen display area, determines whether or not the overwrite image data is in the screen display area based on the calculated document coordinates, Expanding the overwritten image data determined to be at the enlargement ratio and displaying the overwritten image data on the screen display area based on the document coordinates of the overwritten image data. Display method.   When the page display area is identified, the enlarged display control means acquires a horizontal line image in the document area, and determines a pixel portion of the same color continuous from the leading edge or the trailing edge of the line image as a background area. 3. The method for enlarging and displaying a document according to claim 2.   4. The enlarged display control means acquires a horizontal document position from horizontal scroll bar information of the application program, and determines the presence or absence of a background area based on a value of the horizontal document position. Document enlargement display method.   The document enlargement display method according to any one of claims 2 to 4, wherein the enlargement display control means enlarges and displays at least a part of the page area over the entire display screen area.   6. The document enlargement display method according to claim 2, wherein the enlargement display control unit calculates the enlargement ratio of the page area based on the width of the display screen and the width of the page area.   The overwriting rendering control means calculates rendering coordinates by referring to the enlargement ratio from the coordinates of the rendered overwrite image data, and associates the type of the override image data, the rendering coordinates, and the page area image with each other. 7. The document enlargement display method according to claim 2, wherein the document enlargement display method stores the document image data file.   A program for causing an information processing apparatus to execute the document enlargement display method according to any one of claims 2 to 7.   An information processing apparatus-readable recording medium, wherein the program according to claim 8 is recorded.

Images